CN102667587B - Liquid crystal display device - Google Patents
Liquid crystal display device Download PDFInfo
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- CN102667587B CN102667587B CN201080055723.1A CN201080055723A CN102667587B CN 102667587 B CN102667587 B CN 102667587B CN 201080055723 A CN201080055723 A CN 201080055723A CN 102667587 B CN102667587 B CN 102667587B
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- protuberance
- liquid crystal
- pixel electrode
- reflector space
- reflective pixel
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136227—Through-hole connection of the pixel electrode to the active element through an insulation layer
Abstract
Disclosed is a liquid crystal display device with sufficiently improved reflectance. Said liquid crystal display device is provided with a pair of substrates and a liquid crystal layer sandwiched between said pair of substrates. At least one of the pair of substrates has an insulating layer and reflective pixel electrodes used in reflective display. The insulating layer has flat areas around the reflective pixel electrodes and convex areas under the reflective pixel electrodes. There are also bevel areas, between the flat areas and the convex areas, that slant downwards from the flat areas. The mean diameter of the convex areas is between 1 [mu]m and 50 [mu]m, and the height of the top of the reflective pixel electrode layer provided on top of the convex areas is greater than or equal to the height of the flat areas.
Description
Technical field
The present invention relates to liquid crystal indicator.In more detail, the liquid crystal indicator of applicable reflective liquid crystal module is related to.
Background technology
Liquid crystal indicator plays slim light weight and the such speciality of low power consumption, is widely used in electronic equipments such as monitor, projector, portable phone, portable information terminals (PDA).The known transmission-type of such liquid crystal indicator, reflection-type, Semitransmissive (reflection and transmission dual-purpose type) etc.
Transmissive liquid crystal display device guides to the inside of display panels by the light from rear side of the backlight of the rear side by being arranged at display panels etc., outgoing shows to outside.On the other hand, the liquid crystal indicator having reflection-type function has above-mentioned reflection-type, Semitransmissive, reflection-type liquid-crystal display device shows by means of only the inside and the reflecting light from front face side (sightingpiston side) of surrounding or front light-source etc. being guided to display panels, has the excellent visibility under the brighter environment waited without.In addition, transflective liquid crystal display device carries out the reflective display of the light utilized from front face side under a bright ambient environment, and carries out utilizing the transmission from the light of rear side to show under the more dim environment waited in doors.That is, the excellent visibility of reflection-type liquid-crystal display device under bright light environments and the excellent visibility of transmissive liquid crystal display device under dim environment is had concurrently.
In the liquid crystal indicator having reflection-type function, wish the liquid crystal indicator making the scattering efficiently of outer light in limited reflective pixel electrode area, there is wide angle of visibility and high reflectance.Such as, be disclosed on substrate and formed many small protuberances, the reflection-type liquid-crystal display device of better reflectivity can have been obtained (for example, referring to patent documentation 1,2.)。
In addition, disclose a kind of liquid crystal indicator, it is by being configured to rectangular multiplely to have reflexive pixel electrode to form pixel region, at least tilting (for example, referring to patent documentation 3 relative to the display surface direction of pixel electrode of the end of pixel electrodes.)。
prior art document
patent documentation
Patent documentation 1: Unexamined Patent 4-243226 publication
Patent documentation 2: Unexamined Patent 5-232465 publication
Patent documentation 3: JP 2002-268073 publication
Summary of the invention
the problem that invention will solve
But, above-mentioned liquid crystal indicator make by easy method reflectivity fully improve this respect also have research leeway.
And, the high-precision refinement of demand liquid crystal indicator in recent years, also demand transflective liquid crystal display device.Figure 14 is the size of the reflective pixel electrode illustrated in liquid crystal indicator and the schematic top plan view of concavo-convex configuration.The reflective pixel electrode 516 reflective pixel electrode area of existing size is large, also many for the configurable number (concavo-convex configurable number) improving the protuberance 568 in the reflective pixel electrode of reflectivity.By contrast, the reflective pixel electrode 514 reflective pixel electrode area of fine is less, the configurable number of protuberance 568 is also less, and reflective pixel electrode area is little further usually for Semitransmissive reflective pixel electrode 512, and the configurable number of protuberance 568 also further few (Figure 14).Like this, under the present situation of the reflective pixel electrode 514 and Semitransmissive reflective pixel electrode 512 that require the confined fine of the configurable number of reflective pixel electrode area and protuberance 568, though in order to the little reflectivity excellence of the reflecting electrode area realizing every 1 pixel liquid crystal indicator also have research leeway.
The present invention completes in view of above-mentioned present situation, and object is to provide the liquid crystal indicator substantially increasing reflectivity.
for the scheme of dealing with problems
When the present inventor etc. carry out all research to the liquid crystal indicator of reflectivity excellence, be conceived to size and the configuration position of the protuberance in reflective pixel electrode.And find, fail reflectivity is fully improved existing being irregularly formed in the liquid crystal indicator of protuberance as much as possible.Also find, in order to the inclined-plane of reflective pixel electrode neighboring area in the inner part from the periphery of reflector space be effectively utilized the scattering surface into outer light, locating in the inner part than this reflective pixel electrode neighboring area to configure the concavo-convex of regulation, the liquid crystal indicator with high reflectance can be made thus, expect solving the problem with flying colors, reached the present invention.
Namely, the present invention is the liquid crystal indicator possessing a pair substrate and be clamped in the liquid crystal layer between this pair substrate, at least one party in above-mentioned a pair substrate has insulation course and the reflective pixel electrode for reflective display, above-mentioned insulation course has par around reflective pixel electrode, under reflective pixel electrode, there is protuberance, and there is the inclined plane part tilted downwards from this par between this par and this protuberance, the mean diameter of raised part is 1 ~ 50 μm, the height being arranged at the apex of the reflective pixel electrode layer in raised part is more than or equal to the height of this par, be configured in this protuberance under this reflective pixel electrode, 1 reflector space in 1 pixel is only provided with 1, and, relative to the area of this protuberance, the area of this 1 reflector space is less than 4 times of the area of this protuberance, this 1 reflector space, only have 1 reflector space situation in 1 pixel under, refer to this only 1 reflector space, when 1 pixel internal reflection region is split into more than 2, refer to 1 reflector space in this divided reflector space.
By such mode, liquid crystal indicator of the present invention can utilize the protuberance in reflective pixel electrode (jog) to reflect, and above-mentioned inclined plane part can be used as the scattering surface of outer light, can reflectivity be made easily to improve.
So-called have par around above-mentioned reflective pixel electrode, referring to when overlooking substrate interarea, connecting as long as the periphery of reflective pixel electrode is in region, par or with region, par.In addition, above-mentioned par is arranged in grid bus and source bus line usually, and is located at when there being regional transmission in this regional transmission.
The mean diameter of raised part is 1 ~ 50 μm.By being set to this scope, good reflectivity can be obtained.The mean diameter of so-called raised part, refers to the maximum outside diameter of this protuberance and the mean value of minimum outer diameter when overlooking substrate interarea.Preferably the interval of protuberance is 1 ~ 10 μm in addition.When be less than 1 μm or more than 10 μm time just have reflectivity insufficient possibility.
The height that what is called is arranged at the apex of the reflective pixel electrode layer in raised part is more than or equal to the height of this par, be meant to the height playing the substrate interarea certainly with insulation course for benchmark, the height being arranged at the apex of the reflective pixel electrode layer on protuberance is more than or equal to the height of the par of the insulation course around reflective pixel electrode.
The height of the apex of preferred reflective pixel electrode layer is phase co-altitude with the par of insulation course around it.Its reason is, such as in half transmitting type, in order to make transmissive portions consistent with the optical path length (or Δ nd) of reflecting part (transmission units thickness=reflector element thickness × 2), usual needs form transparent film (layer forms ITO electrode, makes the element thickness of reflecting part be the half of the element thickness of transmissive portions) thereon in colored filter (CF) side.At that time, if protuberance is lower than the par of periphery, just need the thickness of corresponding increase hyaline membrane.At that rate, the distance of the par of such as TFT substrate side and the hyaline membrane of CF side can become extremely narrow, causes easily leaking between TFT and CF, become point defect bad due to little thrust (foreign matter etc.).According to above-mentioned, the height on the summit of preferred protuberance is more than or equal to the height of par.
In addition, preferably make that raised part is irregular to be configured in than the region in the inner part of the inclined plane part in reflective pixel electrode.The irregular configuration of so-called raised part, as long as refer to that protuberance is not configure at certain intervals on the longitudinal direction or transverse direction of pixel.Thereby, it is possible to fully prevent the interference of light.
Effectively reflect the angle of reflecting surface of outer light, in other words, the angle of above-mentioned inclined plane part and protuberance is the angle of 30 ° ~ 60 ° relative to substrate interarea, the angle of more preferably 45 ° ~ 60 °.In such scope, balancedly can distribute normal reflection composition for front lighting and become to assign to make it reflection with low angle lateral reflection.
In addition, be difficult to form the protuberance (jog) less than this in current technique.
Usually when overlooking substrate interarea, the region of above-mentioned reflective pixel electrode comprises: occupy the region of the part on par, play distance (preferred d is more than or equal to 1 μm for d from the periphery of reflector space.) inner side till region (also referred to as reflective pixel electrode neighboring area in this instructions) and than from the periphery of reflector space distance be d region in the inner part.
As the formation of liquid crystal indicator of the present invention, as long as above-mentioned inscape must be formed, other inscape is not particularly limited.
Illustrate the optimal way of liquid crystal indicator of the present invention below.
As an optimal way of liquid crystal indicator of the present invention, can enumerate as under type: the above-mentioned inclined plane part being more than or equal to 1 μm is set from the end of above-mentioned par when overlooking substrate interarea.Thereby, it is possible to the area playing the inclined-plane in the region till the inner side that distance is d from the periphery of reflector space that the diffuse transmission influence expanding external light is larger, reflectivity can be made to improve further.
As an optimal way of liquid crystal indicator of the present invention, can enumerate as under type: the area of 1 reflector space in 1 pixel is more than or equal in this 1 reflector space, to be provided with the average area of the protuberance of more than 14 times.Thereby, it is possible to make reflectivity improve further.
The area of so-called above-mentioned 1 reflector space, when overlooking substrate interarea, only have 1 reflector space situation in 1 pixel under, refer to the area of the shared part of this only 1 reflector space, when 1 pixel internal reflection region is split into more than 2, refer to the area of the shared part of 1 reflector space in this divided reflector space.In addition, the average area of so-called raised part, refers to the mean value by 1 protuberance calculation being provided with the protuberance area of more than 1 in reflector space (only have 1 reflector space in pixel or be divided in pixel in the reflector space of more than 2 1).
As an optimal way of liquid crystal indicator of the present invention, can enumerate as under type: the area of 1 reflector space in 1 pixel is less than in this 1 reflector space, to be only provided with the area of the protuberance of 14 times.Thereby, it is possible to make reflectivity improve further.Particularly in this approach, liquid crystal indicator of the present invention is divided into the transflective liquid crystal display device of more than 2, also fully can improve reflectivity, be particularly suitable in this respect when reflector space narrows.
In addition, liquid crystal indicator of the present invention can be particularly suitable for liquid crystal indicator and/or the transflective liquid crystal display device of fine.The area of reflective pixel electrode is less, from the periphery of reflector space, the ratio of the scattering efficiency impact of the external light of area on the inclined-plane of reflective pixel electrode neighboring area is in the inner part larger, and reflectivity therefore can be made in above-mentioned liquid crystal indicator to improve especially.
Such as, the higher limit of the pel spacing on the length direction of preferred pixel is less than 200 μm.Be more preferably less than 170 μm.Lower limit is preferably more than or equal to 50 μm.Be more preferably and be more than or equal to 100 μm.In addition, the higher limit of the pel spacing on the Width of preferred pixel is less than or equal to 60 μm.Be more preferably and be less than or equal to 50 μm.Lower limit is preferably more than or equal to 20 μm.Be more preferably and be more than or equal to 30 μm.
In addition, so-called pel spacing, refers to the length calculated by a pixel in pixel column, such as, refers to the mid point spacing of the minor face of the mid point spacing on the long limit of the pixel on the length direction of pixel or the pixel on the Width of pixel.
Above-mentioned each mode without departing from the spirit and scope of the present invention also can be appropriately combined.
invention effect
According to liquid crystal indicator of the present invention, reflectivity can be made fully to improve.
Accompanying drawing explanation
Fig. 1 is the schematic cross-section of the reflection-type liquid-crystal display device of embodiment 1.
Fig. 2 is the schematic top plan view of the reflective pixel electrode of the TFT substrate of the reflection-type liquid-crystal display device that embodiment 1 is shown.
Fig. 3 is the schematic top plan view of the pixel of the reflection-type liquid-crystal display device that embodiment 1 is shown.
Fig. 4 is the schematic cross-section along the A-A ' line in Fig. 3.
Fig. 5 is the schematic cross-section along the B-B ' line in Fig. 3.
Fig. 6 is the schematic cross-section of the protuberance that liquid crystal indicator is shown.
Fig. 7 is the schematic top plan view of the pixel of the transflective liquid crystal display device of the variation that embodiment 1 is shown.
Fig. 8 is the schematic diagram of the difference of height of reflective pixel electrode in the transflective liquid crystal display device of the variation that embodiment 1 is shown.
Fig. 9 is the schematic top plan view of the concavo-convex configuration illustrated in the reflective pixel electrode of an embodiment of the invention.
Figure 10 is the schematic top plan view of the concavo-convex configuration illustrated in the reflective pixel electrode of an embodiment of the invention.
Figure 11 is the schematic cross-section along the A-A ' line in Figure 10.
Figure 12 is the schematic top plan view of the pixel that existing transflective liquid crystal display device is shown.
Figure 13 is the schematic diagram of the difference of height of the reflective pixel electrode illustrated in existing transflective liquid crystal display device.
Figure 14 is the size of the reflective pixel electrode illustrated in liquid crystal indicator and the schematic top plan view of concavo-convex configuration.
Embodiment
In addition, so-called in this manual " reflector space ", refers to the region (area) being configured with reflective pixel electrode when overlooking substrate interarea in the inner side surrounded by insulation course par.In addition, so-called " regional transmission ", refers to the region contributing to transmission display.That is, for the light of transmission display by the liquid crystal layer of regional transmission, for the light of reflective display by the liquid crystal layer of reflector space.Transflective liquid crystal display device has above-mentioned reflector space and regional transmission.In addition, so-called in this manual " reflective pixel electrode ", refers to the electrode in order to drive liquid crystal to arrange for reflective display.
The substrate with two pixel electrodes of transmissive portions and reflecting part in the substrate with reflective pixel electrode in reflection-type liquid-crystal display device and transflective liquid crystal display device is normally configured with the substrate of TFT, therefore also referred to as TFT side substrate.Substrate relative with TFT substrate in addition is normally configured with the substrate of colored filter (CF), therefore also referred to as CF side substrate.
Enumerate embodiment below and further describe the present invention, but the invention is not restricted to these embodiments.
(embodiment 1)
Fig. 1 is the schematic cross-section of the reflection-type liquid-crystal display device of embodiment 1.
Fig. 2 is the schematic top plan view of the reflective pixel electrode of the TFT substrate of the reflection-type liquid-crystal display device that embodiment 1 is shown.
As depicted in figs. 1 and 2, the reflection-type liquid-crystal display device of embodiment 1, on the upper strata of glass substrate 12 by source bus line 42 and grid bus 52 cross wire, its intersection point is formed the thin film transistor (TFT) as on-off element, clips liquid crystal layer 32 with the substrate (CF substrate) with the substrate (TFT substrate) being configured to rectangular reflective pixel electrode 34 and insulation course (preferred thickness is the resin bed of 2 ~ 5 μm) 36 and the comparative electrode side with common electrode 20 and RGB (red, green, blue) colored filter 24.Polarizer 26 and polarization plates 28 is laminated with in the display surface side of the glass substrate 22 of CF substrate-side.In addition, the gate electrode 13 of thin film transistor (TFT), and source electrode 11 is connected with grid bus 52 and source bus line 42 respectively with drain electrode 15.
TFT substrate has insulation course 36 on the upper strata (being the upper strata of glass substrate 12 at the position not configuring electrode and distribution) of gate electrode 13, source electrode 11, drain electrode 15, source bus line 42, grid bus 52.In addition, insulation course 36 has protuberance under reflective pixel electrode 34 (metal film that reflectivity is good: preferably aluminium or silver etc.).Thereby, it is possible to spread reflection area.In addition, reflective pixel electrode 34 is by drain electrode 15 conducting of contact hole 30 with lower floor.
In the present embodiment, insulation course 36 has par 38 around reflective pixel electrode 34, and has the inclined plane part tilted from this par downwards between this par 38 and this protuberance.The mean diameter of raised part is 1 ~ 50 μm.Preferably 8 ~ 20 μm.The mean diameter of so-called protuberance, refers to the maximum outside diameter of this protuberance and the mean value of minimum outer diameter when overlooking substrate interarea.The interval of protuberance is 1 ~ 10 μm in addition.
And, in the present embodiment, be arranged at the height of height higher than this par 38 of the apex of the reflective pixel electrode layer 34 on protuberance.In addition, the height being arranged at the apex of the reflective pixel electrode layer 34 on protuberance also can be identical with the height of this par.
Fig. 3 is the schematic top plan view of the pixel of the reflection-type liquid-crystal display device that embodiment 1 is shown.
Fig. 4 is the schematic cross-section along the A-A ' line in Fig. 3.
Fig. 5 is the schematic cross-section along the B-B ' line in Fig. 3.
The area of the reflector space 64 shown in Fig. 3 is more than 4 times of the average area of the protuberance 68 be arranged in reflector space 64, and protuberance 68 is irregular to be configured at from the periphery (par of insulation course) of reflector space 64 apart from the region 66 of the inner side for d (d is more than or equal to 1 μm).That is, being more than or equal in the inner part in the region of 1 μm from the periphery of reflector space 64 in the irregular Fig. 3 of being configured at of protuberance 68.By configuring protuberance 68 being more than or equal in the inner part the periphery from reflector space 64 in the region of 1 μm like this, make from the end of par, arrange the inclined plane part 72 tilted from par being more than or equal to 1 μm as shown in Figure 4 and Figure 5 downwards, the scattering surface that inclined plane part 72 can be used as effectively outer light improves reflectivity.In addition, by irregular configuration protuberance 68, the interference of light fully can be prevented.
As shown in Figure 4 and Figure 5, preferred insulation course 36 has the mode of roughly the same protuberance 68 (jog) continuously.In other words, preferred jog is comb-type structure.In addition, the inclined plane part 72 tilted downwards from par becomes more than 30 ° with the angle of protuberance 68 relative to substrate interarea.
As mentioned above, in the liquid crystal indicator of present embodiment, configure protuberance 68 (jog) being more than or equal in the inner part the periphery from reflector space 64 in the region of 1 μm, its manufacture method is as follows.Half exposure is carried out to insulation course 36, the inclined plane part 72 forming protuberance 68 thus and tilt downwards from this par between this par and this protuberance 68, the metal film that the reflectivity of layer spraying plating is thereon good, carries out pattern by photoetching process and forms reflective pixel electrode 34.That is, insulation course 36 is the structures 34 times at reflective pixel electrode with protuberance 68.Between the space between the reflector space not forming reflective pixel electrode 34 (when overlooking substrate interarea, with source bus line and grid bus, and when there being regional transmission the region overlapping with this regional transmission), insulation course 36 keeps smooth state (par 38 of insulation course 36).The structure that reflective pixel electrode 34 is surrounded by par 38, in other words, insulation course 36 is the structures around reflective pixel electrode 34 with par.In addition, as shown in Figure 4 and Figure 5, reflective pixel electrode 34 also can be configured at a part for par 38.
Fig. 6 is the schematic cross-section of the protuberance that liquid crystal indicator is shown.
In this manual, the area of protuberance is not the area of the apex portion of protuberance, and refers to the area in the region (region shown in a in Fig. 6) containing the sloping portion forming protuberance when overlooking substrate interarea.
Fig. 7 is the schematic top plan view of the pixel of the transflective liquid crystal display device of the variation that embodiment 1 is shown.
Fig. 8 is the schematic diagram of the difference of height of reflective pixel electrode in the transflective liquid crystal display device of the variation that embodiment 1 is shown.
In the transflective liquid crystal display device of the variation of embodiment 1, in 1 pixel, be divided into 3 by the reflector space 164 shown in dot-and-dash line.3 protuberances 168 are provided with in 1 reflector space 164 after singulation, in this region, the area of reflector space 164 is more than 4 times of the average area of the protuberance 168 be arranged in reflector space 164, by irregular for protuberance 168 inner side that to be configured in from the par (periphery of reflector space) of insulation course distance be d (d is more than or equal to 1 μm).In addition, the average area of so-called protuberance 168, refers to and is arranged in reflector space (only 1 reflector space in pixel or be divided in pixel in the reflector space of more than 2 1) 1 with the mean value by 1 protuberance calculation of upper convex portion area.
In addition, the reflector space 164 after all the other 2 segmentations is only provided with 1 protuberance 168.In this region, the area of reflector space 164 is less than 4 times of the area of the protuberance 168 being arranged at reflector space 164, and the inner side that distance is d (d is more than or equal to 1 μm) at reflective pixel electrode central portion and from the par (periphery of reflector space) of insulation course forms 1 protuberance 168.In the present embodiment, reflectivity can be made to improve further by such mode.
With shown in the transflective liquid crystal display device being configured with protuberance 168 based on the present invention shown in Fig. 7 and Figure 12 by the transflective liquid crystal display device being configured with protuberance 468 in the past, (in addition, Figure 13 illustrates the schematic diagram of difference of height of the reflective pixel electrode representing this display device.) result that measures reflectivity to confirm that reflectivity has the raising of 7% degree in transflective liquid crystal display device of the present invention.This be due to, protuberance 468 that distance is d is played and compared with the part that tilts, the inclined plane part that the par that distance is d (also referred to as reflective pixel electrode neighboring area) from being set to the periphery in self-reflection region 164 tilts makes the effect of the outer light scattering of per unit area larger downwards with the periphery owing to being set to self-reflection region.
In sum, in order to the inclined-plane of reflective pixel electrode 34 periphery being used as effectively the scattering surface of outer light, the configuration of the protuberance (concavo-convex) under setting reflective pixel electrode 34 is preferably as follows.(1) when the area of reflector space is more than 4 times of the average area of the protuberance being arranged at reflector space, from the par (periphery of reflector space) of insulation course, irregular configuration protuberance in the region of 1 μm is being more than or equal in the inner part.(2) when the area of reflector space is less than 4 times of the area of the protuberance be arranged in reflector space, at reflective pixel electrode 34 central portion and be more than or equal in the inner part from the par of insulation course in the region of 1 μm formed 1 protuberance.
Fig. 9 is the schematic top plan view of the concavo-convex configuration illustrated in the reflective pixel electrode of an embodiment of the invention.Protuberance 268a is provided with in reflector space 264, in this region, the area of reflector space 264 is more than 4 times of the average area of the protuberance 268a being arranged at reflector space 264, is being more than or equal to the irregular configuration protuberance 268a in region (region 266) of 1 μm from the par (periphery of reflector space) of insulation course in the inner part.This is the example that above-mentioned (1) is shown.
Figure 10 is the schematic top plan view of the concavo-convex configuration illustrated in the reflective pixel electrode of an embodiment of the invention.1 protuberance 368 is only provided with in reflector space 364.In this region, the area of reflector space 364 is less than 4 times of the area of the protuberance 368 being arranged at reflector space 364, forms 1 protuberance 368 at reflective pixel electrode central portion from the par (periphery of reflector space) of insulation course in the region (region 366) being more than or equal to 1 μm in the inner part.This is an example of the mode that above-mentioned (2) are shown.
Figure 11 is the schematic cross-section along the A-A ' line in Figure 10.Be formed with 2 roughly the same recesses, respective reflector space outer circumferential side (in other words, being more than or equal to 1 μm from the periphery of reflector space) is provided with the inclined-plane 372 tilted from par downwards.
Each mode in above-mentioned embodiment also can be appropriately combined without departing from the spirit and scope of the present invention.
In addition, the application, based on No. 2009-278782, the Japan's patented claim applied on Dec 8th, 2009, advocates based on Paris Convention and the right of priority of regulation entering state.The full content of this application is incorporated in the application as reference.
description of reference numerals
11: source electrode
12,22: glass substrate
13: gate electrode
15: drain electrode
20: common electrode
24:RGB colored filter
26: polarizer
28: polarization plates
30: contact hole
32: liquid crystal layer
34: reflective pixel electrode
36: insulation course
38: par
42,142,142,442: source bus line
52,152,152,452: grid bus
62: relief region
64,164,264,364,464: reflector space
66,166,266,366,466: from the periphery of reflector space, distance is the region of the inner side of d
68,168,268,368,468,568: protuberance
72,372: the inclined plane part tilted downwards from par
512: Semitransmissive reflective pixel electrode
514: the reflective pixel electrode of fine
516: the reflective pixel electrode of existing size
Claims (2)
1. a liquid crystal indicator, is characterized in that:
Possess a pair substrate and be clamped in the liquid crystal layer between this pair substrate,
At least one party in this pair substrate has insulation course and the reflective pixel electrode for reflective display,
This insulation course has par around reflective pixel electrode, under reflective pixel electrode, have protuberance, and between this par and this protuberance, have the inclined plane part tilted from this par downwards,
The mean diameter of this protuberance is 1 ~ 50 μm,
The height being arranged at the apex of the reflective pixel electrode layer on this protuberance is more than or equal to the height of this par,
Be configured in this protuberance under this reflective pixel electrode, 1 reflector space in 1 pixel is only provided with 1, and relative to the area of this protuberance, the area of this 1 reflector space is less than 4 times of the area of this protuberance,
This 1 reflector space, under only having 1 reflector space situation, refers to this only 1 reflector space, when 1 pixel internal reflection region is split into more than 2, refer to 1 reflector space in this divided reflector space in 1 pixel.
2. liquid crystal indicator according to claim 1, is characterized in that:
When overlooking substrate interarea, from the end of above-mentioned par, be provided with the above-mentioned inclined plane part being more than or equal to 1 μm.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-278782 | 2009-12-08 | ||
| JP2009278782 | 2009-12-08 | ||
| PCT/JP2010/068998 WO2011070866A1 (en) | 2009-12-08 | 2010-10-26 | Liquid crystal display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102667587A CN102667587A (en) | 2012-09-12 |
| CN102667587B true CN102667587B (en) | 2015-05-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080055723.1A Expired - Fee Related CN102667587B (en) | 2009-12-08 | 2010-10-26 | Liquid crystal display device |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20120281171A1 (en) |
| JP (1) | JP5425935B2 (en) |
| CN (1) | CN102667587B (en) |
| WO (1) | WO2011070866A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114839805A (en) * | 2022-04-26 | 2022-08-02 | Tcl华星光电技术有限公司 | Total reflection type liquid crystal display panel |
| CN115774349A (en) * | 2022-11-18 | 2023-03-10 | Tcl华星光电技术有限公司 | Display panel and method for manufacturing display panel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101097359A (en) * | 2006-06-26 | 2008-01-02 | 三菱电机株式会社 | Liquid crystal display device |
| JP2009163273A (en) * | 2009-04-23 | 2009-07-23 | Mitsubishi Electric Corp | Method of manufacturing reflective liquid crystal display device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7215393B2 (en) * | 2000-07-28 | 2007-05-08 | Matsushita Electric Industrial Co., Ltd. | Reflective plate and display device using the plate |
| JP2002328211A (en) * | 2000-07-28 | 2002-11-15 | Matsushita Electric Ind Co Ltd | Reflection sheet, method for manufacturing the same, and display device using the same |
-
2010
- 2010-10-26 US US13/512,029 patent/US20120281171A1/en not_active Abandoned
- 2010-10-26 WO PCT/JP2010/068998 patent/WO2011070866A1/en active Application Filing
- 2010-10-26 JP JP2011545144A patent/JP5425935B2/en not_active Expired - Fee Related
- 2010-10-26 CN CN201080055723.1A patent/CN102667587B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101097359A (en) * | 2006-06-26 | 2008-01-02 | 三菱电机株式会社 | Liquid crystal display device |
| JP2009163273A (en) * | 2009-04-23 | 2009-07-23 | Mitsubishi Electric Corp | Method of manufacturing reflective liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| US20120281171A1 (en) | 2012-11-08 |
| JPWO2011070866A1 (en) | 2013-04-22 |
| JP5425935B2 (en) | 2014-02-26 |
| WO2011070866A1 (en) | 2011-06-16 |
| CN102667587A (en) | 2012-09-12 |
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